PH dependence and thermodynamics of Hg(II) adsorption onto chitosan-poly(vinyl alcohol) hydrogel adsorbent
文献类型：期刊论文
| 作者 | Wang, Xiaohuan; Sun, Ruzhong; Wang, Chuanyi |
| 刊名 | Colloids and Surfaces A: Physicochemical and Engineering Aspects
 |
| 出版日期 | 2014 |
| 卷号 | 441期号:1页码:51-58 |
| 关键词 | pH dependence Thermodynamics Chitosan/poly(vinyl alcohol) hydrogel adsorbent Hg(II) Adsorption |
| ISSN号 | 9277757 |
| 英文摘要 | The chitosan/poly(vinyl alcohol) (CTS-PVA) hydrogel adsorbent with three-dimensional network structure showed superior adsorption properties for Hg(II) ions. The pH influence study showed Hg(II) adsorption on the hydrogel adsorbent is strongly pH-dependent. The adsorption capacity in pH 2.00 solution (200.20. mg/g) is higher than that in pH 11.00 solution (140.27. mg/g), which indicated that Hg(II) adsorption on the hydrogel adsorbent was not only by electrostatic interactions. FT-IR spectral analysis before and after Hg(II) adsorption represented that the functional groups responsible for Hg(II) adsorption changed with the pH of solutions. Thermodynamic studies revealed that Hg(II) adsorption on the hydrogel adsorbent is a favorable, spontaneous, and endothermic chemisorption process. The binding force between Hg(II) ions and functional groups was strengthened at high temperatures, which made the adsorption more favorable at high temperatures. The adsorption process fitted well by the Langmuir and the Freundlich isotherm models. The Langmuir maximum adsorption capacity increased from 697.70 to 950.62. mg/g with increasing temperature from 20 to 60. °C. This study will contribute to an in-depth understanding of adsorption phenomena, and provide a scientific and engineering basis for the practical application of the CTS-PVA hydrogel adsorbent. |
| 收录类别 | SCI |
| WOS记录号 | WOS:000329260800007 |
| 公开日期 | 2014-11-11 |
| 源URL | [http://ir.xjipc.cas.cn/handle/365002/3810]  |
| 专题 | 新疆理化技术研究所_环境科学与技术研究室 |
| 作者单位 | Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xiaohuan,Sun, Ruzhong,Wang, Chuanyi. PH dependence and thermodynamics of Hg(II) adsorption onto chitosan-poly(vinyl alcohol) hydrogel adsorbent[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects,2014,441(1):51-58. |
| APA | Wang, Xiaohuan,Sun, Ruzhong,&Wang, Chuanyi.(2014).PH dependence and thermodynamics of Hg(II) adsorption onto chitosan-poly(vinyl alcohol) hydrogel adsorbent.Colloids and Surfaces A: Physicochemical and Engineering Aspects,441(1),51-58. |
| MLA | Wang, Xiaohuan,et al."PH dependence and thermodynamics of Hg(II) adsorption onto chitosan-poly(vinyl alcohol) hydrogel adsorbent".Colloids and Surfaces A: Physicochemical and Engineering Aspects 441.1(2014):51-58. |
入库方式： OAI收割
来源：新疆理化技术研究所
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